The modern piano evolved rapidly in the first 150 years after its invention, but it is now so good, acoustically, that it probably won’t change much more in the future.
Technically speaking, pianos tuned to coventional 12-tone equal temperament aren’t actually in perfect tune. A new video from MinutePhysics explains the math behind this musical oddity, and why in the case of pianos, close enough is good enough.
Most musical instruments look a little weird, if you stare at them for long enough. When aliens finally make contact, they'll be confused by our habit of gripping wood and metal structures and throttling sound out of them. But some devices are odder than others. Here are the strangest musical instruments of all.